<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

</head>
<body>

<div id="app">
    {{message}}
</div>

<!--1.导入vue.js-->
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.21/dist/vue.min.js"></script>
<script>
    let vm = new Vue({
        el: "#app",
        data:{
            message: "hello,vue!"
        }
    });
</script>

</body>
</html>